34 COELENTERATA. 



Reproductive System. — The ctenophore is hermaphroditic 

 and ova and spermatozoa are proUferated from the walls of the 

 meridional vessels. 



A portion of a ctenophoral row should be cut off, and exam- 

 ined under a microscope, to ascertain the arrangement and rela- 

 tion of plates and cilia. 



Make a drawing of a side view. 



Make a diagram that will show the appearance of a merid- 

 ional cross-section. 



